Computer History - 1400's
| Year | Event |
| 1440 | Johannes Gutenberg completes his development of the Gutenberg press, the first printing press. |
| 1492 | Leonardo da Vinci makes drawing of 13-digit cog-wheeled adder. |
| Year | Event |
| 1440 | Johannes Gutenberg completes his development of the Gutenberg press, the first printing press. |
| 1492 | Leonardo da Vinci makes drawing of 13-digit cog-wheeled adder. |